Fatal error: Uncaught Error: Call to undefined function Automattic\Jetpack\Assets\wp_is_serving_rest_request() in /web/htdocs/www.studioquaser.it/home/wp-content/plugins/wp-menu-icons/jetpack_vendor/automattic/jetpack-assets/src/class-script-data.php:113 Stack trace: #0 /web/htdocs/www.studioquaser.it/home/wp-content/plugins/wp-menu-icons/jetpack_vendor/automattic/jetpack-assets/src/class-script-data.php(88): Automattic\Jetpack\Assets\Script_Data::is_authenticated_rest_request() #1 /web/htdocs/www.studioquaser.it/home/wp-includes/class-wp-hook.php(324): Automattic\Jetpack\Assets\Script_Data::render_script_data('') #2 /web/htdocs/www.studioquaser.it/home/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters('', Array) #3 /web/htdocs/www.studioquaser.it/home/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #4 /web/htdocs/www.studioquaser.it/home/wp-includes/script-loader.php(2214): do_action('wp_print_script...') #5 /web/htdocs/www.studioquaser.it/home/wp-includes/class-wp-hook.php(324): wp_print_head_scripts('') in /web/htdocs/www.studioquaser.it/home/wp-content/plugins/wp-menu-icons/jetpack_vendor/automattic/jetpack-assets/src/class-script-data.php on line 113